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  1. #1
    Established Member Two Rings PhillyOne's Avatar
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    Replace Mass Air flow Sensor or Clean?

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    I see lots of owners just clean them but heres what happened:

    After i drove about 60 highway miles I parked the car, 20 minutes later I went to start the car and it was stuttering than stalled (CEL Light came on). That night I ended up driving about 5 miles (stalling a few times and REALLY struggling to accel etc.) to my mechanic. He ran it through vagcom and as he thought it was the Mass Air Flow sensor. He unplugged it and my cars simply running rich



    My question: Is my Mass Air Flow Sensor completely trashed or could i clean it (Either MAF Cleaner or 99% Rubbing Alcohol) and it would be as good as new?

    I don't want to purchase the MAF Cleaner and special torx bits to remove the MAF from the housing if my MAF is already trashed..

    If it sounds like my MAF is trashed does anyone have a site to get a new one? (ECS seems like a lot for that part).


    Thanks in advance.
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  2. #2
    Veteran Member Three Rings Avant Nate's Avatar
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    My Garage
    2001 Audi Allroad 6MT,1999 Yukon Denali, 1987 4Runner
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    sell the car
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  3. #3
    Try cleaning it first.
    .b

  4. #4
    Established Member Two Rings PhillyOne's Avatar
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    Quote Originally Posted by Avant Nate View Post
    sell the car
    Because of a mass air flow sensor? explain.
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  5. #5
    Established Member Two Rings PhillyOne's Avatar
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    Quote Originally Posted by coolgraymemo View Post
    Try cleaning it first.
    Would just cleaning it in the housing with MAF Cleaner work or should I take it out and do the ziploc bag method. thanks
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  6. #6
    I remember just spraying the one on my old car down [not taking it out]. I don't know if it worked because I ended up getting a new MAF since that one had a piece broken off.

    There are a bunch of people parting out their cars. See who will sell a used one to you - if not, go to the junkyards.
    .b

  7. #7
    Established Member Two Rings PhillyOne's Avatar
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    Quote Originally Posted by coolgraymemo View Post
    I remember just spraying the one on my old car down [not taking it out]. I don't know if it worked because I ended up getting a new MAF since that one had a piece broken off.

    There are a bunch of people parting out their cars. See who will sell a used one to you - if not, go to the junkyards.
    Sounds good man thanks
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  8. #8
    Veteran Member Three Rings Avant Nate's Avatar
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    2001 Audi Allroad 6MT,1999 Yukon Denali, 1987 4Runner
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    Quote Originally Posted by PhillyOne View Post
    Because of a mass air flow sensor? explain.
    I was trying to be funny. Take off the air filter cover, you may need to unplug ICM, maf, etc. and spray maf cleaner on the element. If that doesn't work , then buy a new one. $3 or $200, which one is easier? Ive taken my airbox off probably 10-15 times, so the question seems a little ridiculous.

    And the best way to learn is by doing.
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  9. #9
    Established Member Two Rings PhillyOne's Avatar
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    Took the air box out removed the maf, sprayed it down with MAF cleaner, let it dry, put back together, and no luck...looks like I'll be dropping some cash on a new mafsensor.
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  10. #10
    Veteran Member Four Rings walky_talky20's Avatar
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    In my experience once the sensor is bad enough to throw a code and cause misfires, it can't be saved by just spraying it off. Never tried the plastic bag method. But if mine were causing a problem, I'd definitely try all the free options first. Cause I'm cheap like that. For the customers we'd rather just put in a new sensor so we're sure it's fixed with no return visits.
    ^Don't listen to this guy, he's not even a mechanic.
    2001 Laser Red A4 1.8TQM, 5-Speed Swapped, APR 93, Splitter, electronic oil pressure gauge, B6 Sport 17's, ST Coilovers,
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  11. #11
    Established Member Two Rings PhillyOne's Avatar
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    Quote Originally Posted by walky_talky20 View Post
    In my experience once the sensor is bad enough to throw a code and cause misfires, it can't be saved by just spraying it off. Never tried the plastic bag method. But if mine were causing a problem, I'd definitely try all the free options first. Cause I'm cheap like that. For the customers we'd rather just put in a new sensor so we're sure it's fixed with no return visits.

    Im cheap like that too the maf cleaner didnt work so I tried the plastic bag method (with rubbing alcohol). Its drying now so I'll find out soon. But unfortunately I"m thinking your first sentence is true..
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  12. #12
    Senior Member Three Rings murdered APR a4's Avatar
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    My Garage
    1994 acura integra GS-R, 1994 dodge ram cummins
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    Darien, Wisconsin

    if my awm maf is compatable ill sell you it i just took it off and replaced it with a tt225 maf idk if they are the same though prolly not lol
    2001 Plasti dipped pearl white and black A4

  13. #13
    Established Member Two Rings PhillyOne's Avatar
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    Quote Originally Posted by murdered APR a4 View Post
    if my awm maf is compatable ill sell you it i just took it off and replaced it with a tt225 maf idk if they are the same though prolly not lol
    just ordered one idk if they are the same. My number is: 0280217117

    What reason did you replace it with a tt225 maf instead of an oem awm maf?
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  14. #14
    Veteran Member Four Rings geeky's Avatar
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    Quote Originally Posted by PhillyOne View Post
    just ordered one idk if they are the same. My number is: 0280217117

    What reason did you replace it with a tt225 maf instead of an oem awm maf?
    he's running a different tune that requires a larger MAF (3" iirc)
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  15. #15
    Veteran Member Three Rings Avant Nate's Avatar
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    2001 Audi Allroad 6MT,1999 Yukon Denali, 1987 4Runner
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    Aeb maf is different. I have one on the shelf that is from awm or whatever. Ordered the wrong one from mjm and wouldn't do a return. One of these days I'll try to sell it.
    99.5 1.8T QMS: GT2860RS, PSI T3 Mani, Turbosmart 38mm EWG, Unitronic 415, Forge 007, Treadstone TR18 FMIC, Walbro 255, FSI coil conversion, 3" DIY exhaust
    Depo ecodes, DDM slim 6000k, VDO boost gauge, PLX AFR, Greddy profec B EBC,
    H&R sport springs, 034 rear sway, 18x8 OZ Superleggera

    01 allroad 2.7t 6mt, GIAC stage 1

  16. #16
    Senior Member Three Rings murdered APR a4's Avatar
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    1994 acura integra GS-R, 1994 dodge ram cummins
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    what geeky said i have a k04 with 380cc injectors and tt225 maf.
    2001 Plasti dipped pearl white and black A4

  17. #17
    Veteran Member Four Rings redline380's Avatar
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    2000 Chevy 3500 454 w/9'2" boss vplow
    Location
    St. Paul, Minnesota

    buy a used one. when mine went out i bought a bosch one from a car parts recycler in town and only pad fifty bucks. the dealership wanted four hundred. my thought was that i could buy 8 used for one new. 30,000 miles later and im still on the one i bought used

  18. #18
    Established Member Two Rings PhillyOne's Avatar
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    So I got a new MAF and replaced it (Correctly). The car drives great and the check engine light went off after driving for a few minutes (Cleared itself). A few hours later I filled up with Shell 93 Octane and i than noticed it came back on again. I have a vagcom but the disc is a mini one so its not compatible with my laptop. Any guesses on why its back on?
    Silver 99.5 A4 1.8t FWD Tiptronic & Newly purchased Santorin Blue 99.5 2.8L AWD Manual
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  19. #19
    Veteran Member Four Rings walky_talky20's Avatar
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    There are only like 150,000 different codes (I kid, but there are tons). So...nope. I've got no idea.

    You certainly don't need any kind of disc to use vag-com. VCDS Lite is a download. FTDI drivers are also a download. Whatever version is on that disc is probably way out of date anyway.
    ^Don't listen to this guy, he's not even a mechanic.
    2001 Laser Red A4 1.8TQM, 5-Speed Swapped, APR 93, Splitter, electronic oil pressure gauge, B6 Sport 17's, ST Coilovers,
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  20. #20
    Established Member Two Rings PhillyOne's Avatar
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    haha was just seeing if anyone else had the same thing happen after replacing maf.

    whattt had no idea. Time to download now. Thanks AGAIN

    Quote Originally Posted by walky_talky20 View Post
    There are only like 150,000 different codes (I kid, but there are tons). So...nope. I've got no idea.

    You certainly don't need any kind of disc to use vag-com. VCDS Lite is a download. FTDI drivers are also a download. Whatever version is on that disc is probably way out of date anyway.
    Silver 99.5 A4 1.8t FWD Tiptronic & Newly purchased Santorin Blue 99.5 2.8L AWD Manual
    ..Authentic BBS CK's 18x8.

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  21. #21
    Established Member Two Rings PhillyOne's Avatar
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    Nevermind wont do it on a macbook. gotta borrow someones laptop with windows..
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    ..Authentic BBS CK's 18x8.

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  22. #22
    Why don't you just dual-boot?
    .b

  23. #23
    Veteran Member Four Rings walky_talky20's Avatar
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    Erie, Pennsylvania

    Boot Camp? Or VMWare or some-such should do the trick. Better yet, just send me your Macbook and....yeah. Just send me your macbook.
    ^Don't listen to this guy, he's not even a mechanic.
    2001 Laser Red A4 1.8TQM, 5-Speed Swapped, APR 93, Splitter, electronic oil pressure gauge, B6 Sport 17's, ST Coilovers,
    Need to borrow a Cam Chain Tensioner Tool? $4 for shipping. PM me. *Available*

  24. #24
    Veteran Member Four Rings geeky's Avatar
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    Quote Originally Posted by murdered APR a4 View Post
    what geeky said i have a k04 with 380cc injectors and tt225 maf.
    sorry to side track but is that the uni tune? I just picked up a K04-015 myself and looking at what the possibilities are. Use to own a PC-16 setup so want to get back to the 200awhp mark
    1999 Porsche 911 Carrera2
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  25. #25
    Stage 2 Banner Advertiser Two Rings
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    1998 Audi A4, Quattro, 2.8/30v, Tip; 2001.5 VW Passat GLS, 2.8/30v, 5spd, w/Unitronic
    Location
    Groton, CT

    Quote Originally Posted by walky_talky20 View Post
    In my experience once the sensor is bad enough to throw a code and cause misfires, it can't be saved by just spraying it off. Never tried the plastic bag method. But if mine were causing a problem, I'd definitely try all the free options first. Cause I'm cheap like that. For the customers we'd rather just put in a new sensor so we're sure it's fixed with no return visits.
    I know you may not want to go new, but it may be you're only route to go. At least this way it comes with a warranty, and much cheaper then going to a dealership!


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  26. #26
    Established Member Two Rings PhillyOne's Avatar
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    Quote Originally Posted by walky_talky20 View Post
    Boot Camp? Or VMWare or some-such should do the trick. Better yet, just send me your Macbook and....yeah. Just send me your macbook.
    LOL its not even my macbook i dont have a laptop. everyday struggles.
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  27. #27
    Senior Member Three Rings auh's Avatar
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    2001 Honda CBR600F4i
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    I have no issues running my VAG COM with my Macbook Pro and Parallels 7
    The Car
    1998.5 A4 1.8TQMS: stainless steel brake lines, S5 style projectors w/5k HIDs, 2.5in catback, 710n, K04, FMIC, chip, EFK; SOON TO HAVE LIST: tp, snub

    The Bike
    2001 Honda F4i: currently in a lot of pieces as I put it back together this winter

  28. #28
    Established Member Two Rings PhillyOne's Avatar
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    Quote Originally Posted by auh View Post
    I have no issues running my VAG COM with my Macbook Pro and Parallels 7
    Not my macbook so I can't run that. The CEL's gone anyway so all good. Until the next time..
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  29. #29
    Senior Member Two Rings audienthusiest's Avatar
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    maybe running rich damaged ur o2 sensor? assuming ur still runin well... id say clean ur o2 sensors
    MURPHY'S LAW

  30. #30
    Established Member Two Rings PhillyOne's Avatar
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    Quote Originally Posted by audienthusiest View Post
    maybe running rich damaged ur o2 sensor? assuming ur still runin well... id say clean ur o2 sensors
    The light was on for the second o2 sensor. It said low signal or something like that. I cleared it and it didn't come back since. To clean the o2 sensor do you just unplug n spray with MAF cleaner or?
    Silver 99.5 A4 1.8t FWD Tiptronic & Newly purchased Santorin Blue 99.5 2.8L AWD Manual
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  31. #31
    Senior Member Two Rings
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    melbourne australia

    You cannot clean an O2 sensor! Get a new one!
    96 A4 1.8TQ
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  32. #32
    Senior Member Two Rings audienthusiest's Avatar
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    regardless not a serious problem... my cel is on rite now too!! yay
    MURPHY'S LAW

  33. #33
    Established Member Two Rings PhillyOne's Avatar
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    Quote Originally Posted by bmarshall View Post
    You cannot clean an O2 sensor! Get a new one!
    The code hasnt come back after i cleared it so i figured it just needed to adjust to the new maf (props to walky)..
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  34. #34
    Stage 3 Forum Advertiser Four Rings ECS Tuning-Audi's Avatar
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    Wadsworth,OH

    We do have aftermarket and re-manufactured Genuine VW/Audi MAF sensors if you're on a budget. Check out the link below.

    Click HERE to order or for more information.


    Let me know if you have any questions.

    Jason



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